Integrated Processing of GPS and Gravity Data
Publication: Journal of Surveying Engineering
Volume 115, Issue 1
Abstract
Using phase observations of the Global Positioning System (GPS) we are able to determine relative geometric three‐dimensional coordinates in the 0.1–1 ppm level. Most surveying needs, however, require orthometric heights, or more generally expressed to answer the question where water flows. This can be achieved by determining a high‐precision geoid in the area under investigation, a lengthy task which often is beyond the knowledge of a surveyor. On the other hand, geoid precision equivalent to that of the GPS baseline components is still a challenge for physical geodesy. With OPERA 2.4 (Operational Adjustment) and OPUS (Opera Utilization System) an interactive software system is developed which handles all adjustment problems in one, two, or three dimensions. Besides the densification of existing horizontal networks by GPS baseline components it can process in one integrated approach gravity and height information from a data base in order to come up with horizontal ellipsoidal coordinates and orthometric heights replacing the traditional time consuming and expensive spirit leveling. OPERA 2.4 is able to work purely geometrically or can also be used solely for high‐precision local geoid determination. Various pre‐ and postprocessing capabilities like graphical output are built in. As a practical example the GPS subsidence network in Maine is processed and results are compared to other adjustment techniques.
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References
1.
Denker, H., and Wenzel, H.‐G. (1987). “Local geoid determination and comparison with GPS results.” Bull. Geod., 61, 349–366.
2.
Eeg, J., and Krarup, T. (1973). “Integrated Geodesy.” Internal Report No. 7, The Danish Geodetic Institute, Copenhagen, Denmark.
3.
Eissfeller, B., et al. (1985). “The processing of GPS‐baseline vectors in conventional geodetic networks using gravity field information and least‐squares collocation.” Proc. 7th International Symposium on Geodetic Computations, Cracow, Poland, Jun., 543–572.
4.
Eissfeller, B. (1986). “The estimation of orthometric heights from GPS baseline vectors using gravity field information and least‐squares collocation.” In: Landau, H., B. Eissfeller and G. W. Hein, GPS‐research at the Institute of Astronomical and Physical Geodesy. Schriftenreihe des universitären Studiengangs Vermessungswesen, Universität der Bundeswehr Müchen, 107–126.
5.
Engelis, T., et al. (1984). “The precise computation of geoid undulation differences with comparison to results from the Global Positioning System.” Geophysical Research Letters 11(9), 821–824.
6.
Engelis, T., et al. (1985). “Measuring orthometric height differences with GPS and gravity data.” Manuscripta Geodaetica 10, 187–194.
7.
Hein, G. W. (1982a). “A contribution to 3d‐operational geodesy. Part 1: Principle and observational equations of terrestrial type.” Proc. of the international symposium on geodetic networks and computations of the IAG, Munich, Deutsche Geodatische Kommission, Aug. 31 to Sep. 5, 1981, Reihe B, Nr. 258/VII, 31–64.
8.
Hein, G. W. (1982b). “A contribution to 3d‐operational geodesy. Part 2: Principles of solution.” Proc. of the international symposium on geodetic networks and computations of the IAG, Munich, Aug. 31 to Sep. 5, Deutsche Geodätische Kommission, Reihe B, Nr. 258/VII, 65–85, 1982.
9.
Hein, G. W. (1986a). “The role of GPS data in gravity field approximation or the role of the gravity field in GPS surveys.” Boll. Geod. e. Sci. Aff., 249–272.
10.
Hein, G. W. (1986b). “Integrated geodesy. State‐of‐the‐art 1984 reference text.” Sünkel, H. (Ed.), Mathematical and numerical techniques in physical geodesy, lecture notes in Earth sciences, No. 7, Springer‐Verlag, 505–548.
11.
Hein, G. W., and Landau, H. (1983). “A contribution to 3d‐operational geodesy. Part 3. OPERA—a multi‐purpose program for operational adjustment of geodetic observations of terrestrial type.” Deutsche Geodätische Kommission, Reihe B, Nr. 264, München.
12.
Kaula, W. M. (1987). “The need for vertical control.” Surveying and Mapping, 47(1), 57–64.
13.
Lambert, St. R. (1987). “Monitoring vertical crustal deformation in eastern Maine using GPS derived orthometric heights,” thesis presented to the University of Maine in partial fulfillment of the requirements for the degree of Master of Science.
14.
Landau, H., et al. (1988). “OPERA 2.4 User's Guide.” Inst. of Astronomical and Physical Geodesy, University FAF Munich, W. Germany.
15.
Moritz, H. (1980). Advanced physical geodesy. Herbert Wichmann Verlag, Karlsruhe.
16.
Palte, G. (1987). “Stabilizing height networks by GPS‐measurements.” Presented at the General Assembly of the International Union of Geodesy and Geophysics (IUGG), Vancouver, Aug. 9–12, 1987.
17.
Schwarz, K. P., et al. (1987). “Orthometric heights without leveling.” Journal of Surveying Engineering, 113(1).
Information & Authors
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Published In
Journal of Surveying Engineering
Volume 115 • Issue 1 • February 1989
Pages: 15 - 33
Copyright
Copyright © 1989 ASCE.
History
Published online: Feb 1, 1989
Published in print: Feb 1989
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